Shock-absorber for motor-cars and other vehicles.



CLES.

APPLICATION FILED AUG.6. I917.

Patented Jan. 7, 1919.

w L a 5 5 W W nu T. E V

barren snares arenas MARTIN nnainolv,

OF OPENSH aw, manonnsrnn, ENGLAND.

SHOCK-ABSORBER FOR MOTOR-CARS AND OTHER VEHICLES.

To all whom it may concern: 7

Be it known that I, MARTIN Dunn-101v, a subject of the King of Belgium, residing at Openshaw, Manchester, England, have invented certain new and useful Improvements in ShoclcAbsorbers for Motor-Cars and other Vehicles, of which the following is a specification.

This invention relates to shock absorbers for motor-cars and other suspended vehicles said shock absorbers being of that kind described in my United States Patent No. 1068329 dated the construction of the shock absorber being such that it permits of the free compression and the free expansion of the suspension spring and exercises a retarding ac:

the normal position.

tiou only on the return movement toward This retarding action is of a constant value in the two directions, however great may be the amplitudes of vibration of the suspension springs,

The said prior patent described how the above result could be attained by means. of a cylinder or chamber filled with oil or other fluid and containing a piston or pistons or rotary blades, connected with the axle of the vehicle and arranged in uch a manner as not to exercise any influence on the elastic compression and expansion of the springs, that is to say, on the relative displacements which occur between the chassis of the vehicle and the hub of the wheels when the lat ter encounter an unevenness or a depression in the road, but to retard the rapidity of the return movements toward the normal position (which follow the said compression or the said expansion of the spring) and this with a constant resistance whatever may be the position taken by the piston or the blades.

The specification of the said Patent No. 1068329 particularly described an arrangement comprising valves carried by two blades in one piece, which are movable in relation to a fixed Wall or partition in an oil cylinder, in such a manner that either one or the other of the said Valves opens according to the direction of displacement from the normal position of the spring. The portion of the cylinder between each of the two blades (placed in the normal position) and the fixed wall is bored to a diameter larger than that of the circumference described by the external edges of the blades, so aS to allow the blade, which has been brought to Specification of Letters Patent.

the 22nd day of July, 1913,,

Patented Jan, "t, 19w.

Application filed August 6, 1917. Serial No. 18%,726. 1

that part, to socillate without any' resistance, while the other blade then engaged in the truly-bored portion of the cylinder, acts as a piston when the blade returns to the normal position.

The present invention relates to a modification of the above arrangement, and con sists in the provision of a recess at the end of the cylinder for the passage of the oil from the chambers comprised between each of the blades and the fixed wall or partition into the chamber inclosed between the two blades, instead of a portion of the cylinder being bored to a larger diameter for this purpose.

. Figure l of the accompanying drawings is a section through a shock absorber construct ed according to the present invention, the section being taken through A--B (Fig. 2).

Fig. 2 is a section on line C 1) (Fig. 1).

The apparatus consists of an oil cylinder 4 a partitioned in the middleby a. transverse stop plate 9. A double piston e-Z moves in the cylinder a on one side and the other of the partition g, around pin b. Cylinder a is fixed to the chassis of the vehicle. while the blades e-d are connected with the axle by means of a lever and a suitable link gear.

Each of the pistons e and cl has a drilled opening 2'; these openings 2' are closed alter nately by flaps or valves 0 which can open downward.

In order to admit of the oil passing freely from one side to the other-of thepiston, while the latter is moved away from the normal position, a passage is formed at the lateral edges of the blades. For this purpose the end or cover of the cylinder a is hollowed or recessed between the normal position of the blades 6 and (Z and the fixed partition g. This hollowed or recessed part may conveniently be produced by placing within the end of the cylinder a disk f provided with recesses or tablish communication between the two compartments of the cylinder a when the-corresponding blade approaches the partition 9.

From the above, it follows that when the spring of the vehicle is compressedpr; expands. the blades 6 and d oscillate around pin 6, and the valve 6 of the blade which moves upward then opens while the blade which moves downward opens the conduit establishing the communication between the two compartment of cylinder (,1.

In this manner, no retarding action is produced. On the contrary, during the return openings h which es-.

ti'veiy to open according to the direction of movement of the blades from the normal po- 15 sition, and a plate located in the end of the casing and having recesses or openings sitdated. between the normal position of the blades and the fixed partition.

In testimony whereof I have hereunto set 20 my hand in presence of two subscribing wit-- nesses.

MARTIN DERIHON.

Witnesses:

CHAS. P. PRESSLY, DOLPHY KAIIN. 

